Milky Baltic Amber and Silver Necklace - Natural Designer GemstoneTop quality gorgeous natural milky Baltic Amber Necklace from Gdansk, Poland. White & milky amber are ones of the rarest and most highly valued varieties of Baltic amber. The white colour of amber is caused by microscopic gas bubbles (or water particles) with diameter 0. 0008 0. 001 mm encapsulated inside the resin during its hardening process (fossilisation). This is similar to what happens to an egg white when you whip it. First, it is light yellow